Am i overthinking on how much to feed the guests?

So I’m planning for my August 2026 wedding. Registry office with 4 witnesses and then a big party reception. The big part of the day is the reception and that’s where I think(?) I’m overthinking. Was timing for 5pm til (venue is licensed til 2am). Food wise we want food trucks; fish and chips and a hog roast and an ice cream van for pudding (hiring time 6pm-9pm) so everyone would have eaten around that time.
Should I then be putting out more food (small buffet style) around 9:30-10pm ish?
If people are drinking will I need more food around that time? Not eating from 6pm - 12am is a long time in my opinion (we are a family of eaters) would you put out more food around that time or make do with just the food trucks?